The BGS Lexicon of Named Rock Units — Result Details

Park Hill Member

Computer Code: PAH Preferred Map Code: PHM
Status Code: Full
Age range: Comley Series (EC) — Comley Series (EC)
Lithological Description: Grey medium-grained sandstone with thin breccia layers in basal 17m: main part in beds 0.2-0.8m thick showing herringbone cross-bedding. Very rare mudstone beds or drapes.
Definition of Lower Boundary: At base of first bed to show cross bedding and an undulatory top surface. Lower sandstones are massive, with planar or only gently undulatory tops.
Definition of Upper Boundary: Bedding plane beneath first significant development of mudstone with thin, sharp-based sandstone beds. Mudstone drapes ubiquitous in beds above this.
Thickness: 30 - 56m. 35m in type section (min), 34m in reference section (min).
Geographical Limits: From Nuneaton town centre, extending northwest for 3.5km to just east of Cherry Tree Farm (SP 3548 9220-3262 9521)
Parent Unit: Hartshill Sandstone Formation (CQ)
Previous Name(s): Park Hill Quartzite (-3602)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Northeast face of Hartshill Quarry, 700m west-north-west of Hill Farm (SP 3425 9360) 
Partial Type Section  Upper northwest face of Boons Quarry, 150m west-north-west of Grange Farm. 
Reference(s):
Brasier, M D, Hewitt, R A and Brasier, C J, 1978. On the late Precambrian - Early Cambrian Hartshill Formation of Warwickshire. Geological Magazine, Vol.115/1, p.21-36. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E169